Top 4 Factors That Affect Oil Yield in Press Machines

As a traditional oil extraction technology, the pressing method is widely used in the oil processing industry. The oil press is the core equipment in the edible oil production line, and its oil yield directly impacts production efficiency and the profitability of oil mills. However, in actual production, various factors can affect the oil yield. Huatai Oil Machinery has summarized the following reasons for your reference.

The main factors affecting oil yield during production are as follows:

Raw Material Quality

The quality of raw materials is the foundation for determining oil yield. If the raw materials contain excessive impurities, moisture, immature seeds, or moldy and deteriorated seeds, these impurities can adsorb oil during the pressing process, reducing oil yield and compromising the quality of the final product. Therefore, production often involves cleaning and removing impurities from the raw materials using equipment such as vibrating cleaning screens, stone removers, magnetic separators, and cyclone dust collectors to screen out impurities and moldy seeds, thereby improving raw material quality.

Improper Pretreatment of Oil Seeds

Before pressing, oil seeds undergo various processes such as dehulling, peeling, crushing, flaking, and cooking based on their characteristics. These steps process the whole seeds into flakes or crushed materials, which are then fed into the oil press for extraction. Inadequate pretreatment, such as uneven crushing particle size or improper cooking time, temperature, or moisture, can result in insufficient rupture of the oil seed cell walls, making it difficult to fully extract the oil and thereby reducing the oil yield.

Inappropriate Pressing Conditions

The temperature, pressure, and duration during the pressing process directly impact oil yield. Excessively high temperatures can affect oil quality, while excessively low temperatures can reduce oil yield. Insufficient pressure may fail to fully squeeze out the oil, resulting in high residual oil content in the meal, while excessive pressure may damage the physicochemical properties of the oil. The pressing duration must be precisely controlled, as either too long or too short a time can adversely affect oil yield.Huatai provides free installation and debugging services, with technicians on-site for equipment setup and operational training, ensuring users can produce with confidence without worrying about process-related issues.

Influence of Technical Processes

During the oil pressing process, the skills and experience of the operators also play a significant role. Improper operations, such as inaccurate control of temperature and time during pretreatment, untimely or unreasonable adjustments of pressing parameters, and oversights in post-pressing treatment, can directly lead to a decline in oil yield.